|Model|Origin|Type|Version|In Service|Notes|
|---|---|---|---|---|---|
|LARC-V|United States|Amphibious Support Vehicle|LARC-V|5|Most refurbished in 2006.|
|GKN Aquatrack|United Kingdom|Amphibious Support Vehicle|Aquatrack|2|Introduced in mid 1990s. Originally owned by the Office of Civil Defense but under PMC stewardship.|
|AM General HMMWV|United States|Light Utility Vehicle|M998A1  M1038A1  M1025A1|-|Divided into several variants and series|
|Maxi-Ambulance|United States|Light Utility Vehicle|M997A2|4|150 delivered to AFP on November 2011, PMC received 50 units.|
|M939 truck|United States|Heavy Utility Vehicle|M923|-|Several delivered to AFP in 2013, several units for the Marines.|
|M35 Truck|United States|2 1/2-ton Utility Vehicle|M35|-|Divided into several variants and series. More delivered in 2013.|
|M151|United States|1/4-ton Light Utility Vehicle and Weapons Carrier|Standard|-|In Service, several carrying M40 106mm recoilless rifle|
|Delta Mini Cruiser|Philippines|1/4-ton Light Utility Vehicle|M1777|-|Divided into several variants and series, including short and stretched utility and armed variants, and modified variants for specialized units.|
|Marine Multi-purpose Vehicle|Philippines|Light Utility Vehicle and Weapons Carrier|Standard|-|To replace the M151 MUTT, usually armed with an M40 106mm recoilless rifle, or as a cheaper alternative to the Humvee.|
|KM-50 Series|Republic of Korea|5-ton Utility Vehicle|KM-500|12|155mm Artillery prime mover. 1st batch of 6 delivered 2012.|
|KM-45 Series|Republic of Korea|1 1/2-ton Utility Vehicle|KM-450|>50|3000 purchased by AFP on 2007, 1000 units shared by Navy/Marines and Air Force|
|KM-45 Series|Republic of Korea|Field Ambulance|KM-451|12|500 purchased by AFP in 2012, 200 went to the Marines.|

Question: how many maxi-ambulance vehicles are in service?
Answer: 4